left supinator
Muscular systemUpper limbLeftFMA38514
Nomenclature
left supinator
musculus supinator (Latin)
muscolo supinatore sinistro (Italian)
Descriptionentry
Deep muscle wrapping the proximal third of the radius; traversed by the posterior interosseous nerve.
Functionentry
Supination of the forearm.
Originentry
Lateral epicondyle of the humerus, annular ligament and supinator crest of the ulna.
Insertionentry
Proximal third of the lateral and anterior surfaces of the radius.
Innervationentry
Posterior interosseous nerve, a branch of the radial (C7-C8).
Blood supplyentry
Radial recurrent artery.
Clinical notes
The arcade of Frohse is a site of posterior interosseous nerve compression.
Model